A universal column hoop and a construction method for cast-in-place irregular frame columns using the universal column hoop.

Abstract

This invention discloses a universal column hoop and a construction method for cast-in-place irregular-shaped frame columns using the universal column hoop, belonging to the technical field of cast-in-place concrete component formwork installation. It includes: a rectangular frame and multiple sets of internal corner supports; the internal corner supports include: transverse channel steel and longitudinal channel steel, with the transverse channel steel slidably mounted on the top of the longitudinal channel steel. One end of both the transverse and longitudinal channel steels is welded with a long nut, and the other end has a waist-shaped hole. The rectangular frame includes: a first parallel component and a second parallel component, which are set at the same height as the transverse and longitudinal channel steels and connected by fasteners. This invention decomposes the reinforcement system of irregular-shaped column formwork into two systems: a rectangular frame and internal corner supports, which respectively bear the lateral pressure of the overall and internal corner irregular-shaped column formwork. This overcomes the problem that column hoops cannot be installed at the internal corners of irregular-shaped columns, distributing the lateral pressure of concrete pouring on the irregular-shaped column formwork within the column hoop system, and firmly positioning the irregular-shaped column formwork at all locations.

Description

Technical Field

[0001] This invention belongs to the field of formwork installation technology for cast-in-place concrete components, and in particular relates to a universal column hoop and a construction method for cast-in-place irregular frame columns using the universal column hoop. Background Technology

[0002] Irregularly shaped columns refer to columns with different geometric cross-sections based on the building's function and design layout requirements, while meeting structural stiffness and load-bearing capacity requirements. The ratio of the height to thickness of each leg in the cross-section is no greater than 4. Common cross-sectional shapes include L-shaped, T-shaped, cross-shaped, and Z-shaped. With the promulgation and implementation of the national industry standard "Technical Specification for Irregularly Shaped Concrete Column Structures" (JGJ149-2017), irregularly shaped column frame structures have become a new type of residential construction and have been widely used in residential buildings in many provinces and cities across China, achieving significant social and economic benefits.

[0003] Reinforced concrete irregular column structures organically combine architectural aesthetics and functional flexibility with reasonable load-bearing performance. The column section thickness is consistent with the infill wall thickness, effectively avoiding the drawbacks of traditional rectangular frame columns protruding from the wall, affecting aesthetics, and occupying building space. It improves room utilization and has advantages such as good modifiability, material saving, low cost, full utilization of space, and flexible and convenient use. Compared with rectangular column frame structures, it increases the usable area by 0.6% to 1.2% or more, providing users with an ideal living environment. It is a new type of structural technology that saves energy consumption, reduces building weight, and adapts to changing functional needs.

[0004] Currently, in the formwork installation process for cast-in-place irregular columns, column hoops cannot be installed at the internal corners of the irregular columns, and reinforcement relies entirely on through-formwork tie bolts or diagonal braces. Repeated drilling and sealing of the tie bolt holes in the formwork increases labor costs, compromises the integrity and tightness of the formwork, and affects the appearance of the finished component. Furthermore, the sawdust residue from drilling is difficult to clean from inside the formwork, impacting structural quality. Irregular columns have small cross-sections, and limited on-site operating space often results in insufficient tie bolts and diagonal braces, leading to a lack of sufficient strength and stability in the formwork system. Additionally, the numerous internal and external corners of irregular column formwork often result in loose joints, insufficient rigidity, and difficulties in fixing. During concrete pouring, under the lateral pressure of the concrete, the irregular column formwork is prone to displacement or cracking, leading to a series of quality defects such as deformation, twisting, bulging and grout leakage, slag inclusion, and misaligned edges. These directly affect subsequent plastering and surface decoration, requiring structural rework. This not only affects the structural quality and the appearance of the components after they are formed, but also incurs a lot of costs for chiseling and removing parts, resulting in a loss of benefits. Summary of the Invention

[0005] The purpose of this invention is to provide a universal column hoop and a construction method for cast-in-place irregular frame columns using the universal column hoop, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] A general-purpose column hoop includes: a rectangular frame and multiple sets of internal corner supports; the internal corner supports include: transverse channel steel and longitudinal channel steel, the transverse channel steel is slidably disposed at the top of the longitudinal channel steel, one end of the transverse channel steel and the longitudinal channel steel are welded with long nuts, and the other end is provided with a waist-shaped hole, the rectangular frame includes: a first parallel component and a second parallel component, the first parallel component and the second parallel component are respectively set at the same height as the transverse channel steel and the longitudinal channel steel and connected by fasteners.

[0008] Preferably, the first parallel component includes: two sets of parallel double steel pipe keels, and an adjustment mechanism is installed between the two sets of double steel pipe keels.

[0009] Preferably, the adjusting mechanism includes: a tie rod, which passes through the waist-shaped hole of the transverse channel steel, and both ends of the tie rod are fitted with mountain-shaped buckles, which are respectively fastened to the outer sides of two sets of double steel pipe keels.

[0010] Preferably, both ends of the tie rod and the waist-shaped hole near the transverse channel steel are threaded with fastening nuts.

[0011] Preferably, the fastener includes: a long screw rod, one end of which is threaded into a long nut on the transverse channel steel, and the other end is fitted with a heavy-duty thickened mountain-shaped clamp and double nuts to clamp and lock the double steel pipe keel.

[0012] Preferably, the second parallel component has the same structure as the first parallel component, and the adjustment method of the second parallel component and the fixing method of the second parallel component to the vertical channel steel are the same as those of the first parallel component.

[0013] A construction method for cast-in-place irregular frame columns using general column hoops includes the following steps:

[0014] S1: Template Configuration

[0015] Based on the structural form of the project and the on-site construction conditions, design and determine the assembly scheme of the irregular column formwork, clarify the specifications and quantity of general column hoops and secondary joists, the spacing and arrangement dimensions of general column hoops, verify the strength, rigidity and stability of the formwork and supports, and draw a complete set of formwork assembly diagrams.

[0016] S2: Measuring the chalk line

[0017] On the base layer, measure and mark the column edge lines and formwork control lines according to the design positions, use a chalk line to pop out the ink lines, and mark them with red paint;

[0018] S3: Base treatment

[0019] Remove the weak layer at the joint of the base layer and wash it clean. Use cement mortar to strictly level the base of the irregular column formwork within a 100mm width to prevent concrete leakage at the bottom of the irregular column formwork and the formation of rotten roots.

[0020] S4: Tying column reinforcement bars

[0021] Calculate the required number of stirrups, insert the stirrups into the column longitudinal bars, and then extend the column longitudinal bars one by one. Align the upper and lower column longitudinal bars at the joint with the axis and screw them into the connecting sleeve. Tighten with a torque wrench.

[0022] S5: Formwork support

[0023] According to the column edge line position, weld the horizontal support bars on the short steel bars pre-embedded in the floor slab inside the column to support the irregular column formwork from the bottom perimeter to prevent displacement. The irregular column formwork is installed in different sections according to different parts. The irregular column formwork at the external corner is installed as a single piece on one side, and the irregular column formwork at the internal corner is installed by pre-assembling two adjacent sides into one piece.

[0024] S6: Install universal column clamps

[0025] First, adjust the secondary keel at the inside corner of the irregular column formwork, and temporarily fix it to the secondary keel with lead wire. Then, install the first parallel component and the second parallel component around the four sides of the irregular column formwork, corresponding to the positions of the horizontal and vertical channel steels, to form a rectangular frame to initially reinforce the irregular column formwork. Use fasteners to fix the positions of the horizontal channel steel and the first parallel component, and the vertical channel steel and the second parallel component, and then adjust them synchronously through the adjustment mechanism to form a cross-interlocking structure between the inside corner support, the rectangular frame and the irregular column formwork.

[0026] S7: Install tie rods or diagonal braces

[0027] Use turnbuckles or adjustable screws as tie rods or diagonal braces for irregular column formwork, and fix them to the column stirrups and short steel bars embedded in the floor slab respectively, at a 45° angle to the ground, in order to adjust the verticality of the irregular column formwork.

[0028] S8: Calibration and Acceptance

[0029] After the irregular column formwork is installed, it must be ensured that the shape, size and relative position of the irregular column are accurate, and that it can reliably withstand the lateral pressure of the cast-in-place concrete and the construction load, and has sufficient strength, rigidity and stability.

[0030] S9: Pouring concrete;

[0031] S10: Remove the column clamps and clean up for future use.

[0032] The present invention provides a universal column hoop and a construction method for cast-in-place irregular frame columns using the universal column hoop, which has the following advantages compared with the prior art:

[0033] 1. This invention has the advantages of reasonable stress distribution, sturdiness and durability, convenient assembly and disassembly, strong versatility and high turnover rate. It eliminates a series of quality defects that are common in the construction of cast-in-place irregular frame columns, such as deformation and twisting, bulging and leakage of grout, slag inclusion and bite, and misaligned edges and corners. It effectively prevents rework waste caused by structural chiseling, ensures accurate cross-sectional dimensions of irregular frame columns, and ensures that the edges and corners are vertical and square, thereby improving the overall quality of irregular column formwork installation and the appearance of cast-in-place structures.

[0034] 2. This invention decomposes the reinforcement system of irregular column formwork into two systems: a rectangular frame and a corner support. These systems respectively bear the lateral pressure of the overall irregular column formwork and the irregular column formwork at the corner. This overcomes the problem that column hoops cannot be set at the corner of the irregular column. The lateral pressure of concrete pouring on the irregular column formwork is distributed in the column hoop system, and the irregular column formwork at all parts is firmly positioned.

[0035] 3. This invention has a simple structure, is easy to manufacture, and is simple and quick to load and unload on site. It is stable and reliable, simplifies the construction process, reduces the labor intensity of workers, can be reused multiple times, and saves a lot of auxiliary materials and labor input, thereby reducing costs, improving work efficiency, and speeding up the construction progress. It has good promotional value. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0037] Figure 1 This is a three-dimensional structural diagram of the cast-in-place L-shaped frame column of the present invention;

[0038] Figure 2 This is a three-dimensional structural diagram of the corner support of the present invention;

[0039] Figure 3 This diagram shows the fit between the double-headed slider and the transverse and longitudinal channel steels of the present invention.

[0040] Figure 4 This is a top view of the cast-in-place L-shaped frame column of the present invention;

[0041] Figure 5 This is a top view of the cast-in-place T-shaped frame column of the present invention;

[0042] Figure 6 This is a top view of the cast-in-place cross-shaped frame column of the present invention;

[0043] Figure 7 This is a top view of the cast-in-place Z-shaped frame column of the present invention.

[0044] In the diagram: 1-Transverse channel steel, 2-Vertical channel steel, 3-Long nut, 4-Oval hole, 5-Double steel pipe keel, 6-Tie rod, 7-W-shaped buckle, 8-Fastening nut, 9-Long screw, 10-Heavy-duty thickened w-shaped clip, 11-Irregular column template, 12-Secondary keel, 13-T-shaped slide, 14-Double-headed slider. Detailed Implementation

[0045] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments:

[0046] Example 1

[0047] refer to Figure 1-3 As shown, this invention provides a universal column clamp, comprising: a rectangular frame and multiple sets of internal corner supports; the internal corner supports include: a transverse channel steel 1 and a longitudinal channel steel 2, the transverse channel steel 1 being slidably disposed at the top of the longitudinal channel steel 2, both the transverse channel steel 1 and the longitudinal channel steel 2 having a long nut 3 welded to one end and a waist-shaped hole 4 opened at the other end; the rectangular frame includes: a first parallel component and a second parallel component, the first parallel component and the second parallel component being set at the same height as the transverse channel steel 1 and the longitudinal channel steel 2 respectively and connected by fasteners. The first parallel component includes: two sets of parallel double steel pipe keels 5, with an adjusting mechanism installed between the two sets of double steel pipe keels 5. The adjusting mechanism includes: a tie rod 6, the tie rod 6 passing through the waist-shaped hole 4 of the transverse channel steel 1, both ends of the tie rod 6 being fitted with a mountain-shaped buckle 7, the two mountain-shaped buckles 7 being respectively fastened to the outer sides of the two sets of double steel pipe keels 5. Both ends of the tie rod 6 and the waist-shaped hole 4 near the transverse channel steel 1 are threaded with fastening nuts 8. The fixing component includes a long screw 9, one end of which is threaded into a long nut 3 in the transverse channel steel 1, and the other end is fitted with a heavy-duty thickened mountain-shaped clamp 10 and a double nut clamping and locking double steel pipe keel 5. The second parallel component has the same structure as the first parallel component, and the adjustment method of the second parallel component and the fixing method of the second parallel component to the vertical channel steel 2 are the same as those of the first parallel component. Preferably, the bottom end of the transverse channel steel 1 and the top end of the longitudinal channel steel 2 are provided with T-shaped sliding grooves 13, the two T-shaped sliding grooves 13 are arranged perpendicularly, and a double-headed slider 14 is slidably arranged in both T-shaped sliding grooves 13. According to the cross-sectional dimensions of different secondary keels 12, the transverse channel steel 1 and the longitudinal channel steel 2 can be adjusted by the T-shaped sliding grooves 13 and the double-headed slider 14, thereby further improving the adaptability of the internal corner support.

[0048] Example 2

[0049] like Figure 1-4As shown, this invention provides a construction method for cast-in-place irregular frame columns using universal column hoops, comprising the following steps:

[0050] S1: Template Configuration

[0051] Based on the engineering structure and on-site construction conditions, the assembly scheme of the irregular column formwork 11 was designed and determined. The specifications, quantities, spacing, and layout dimensions of the general column hoops and secondary joists 12 were specified. The strength, stiffness, and stability of the formwork and supports were verified, and a complete set of formwork assembly drawings was drawn. Simultaneously, the spacing of the tie rods 6 was determined based on structural stress calculations; generally, the longitudinal and transverse spacing should not exceed 600mm. The tie rods 6 were arranged according to the principle of denser spacing at the bottom and sparser spacing at the top. The bottom row of tie rods 6 should not be more than 200mm from the bottom of the component, and the top row of tie rods 6 should not be more than 250mm from the top of the component, thus reasonably distributing the lateral pressure borne by the irregular column formwork 11.

[0052] The formwork should be made according to the formwork drawing set. The irregular column formwork 11 should be made in sections. The secondary keel 12 should be made of square timber of the same specifications. It should be planed on both sides, straight and without deformation. The net space distance should not be greater than 200mm. The irregular column formwork 11 and the secondary keel 12 should be nailed firmly with nails at 300mm intervals. The joints of the irregular column formwork 11 must be planed to ensure tight joints.

[0053] S2: Measuring the chalk line

[0054] On the base layer, mark the column edge lines and formwork control lines according to the design position, use a chalk line to pop out the ink lines, and mark them with red paint; measure two elevation control points, level the base layer elevation, and measure the +500mm horizontal elevation control point on the column longitudinal reinforcement, and mark it with red tape.

[0055] S3: Base treatment

[0056] Remove the weak layer at the joint of the base layer and wash it clean. Use cement mortar to strictly level the 100mm wide area at the base of the irregular column formwork 11 to prevent concrete leakage at the bottom of the irregular column formwork 11 and the formation of rotten roots.

[0057] S4: Tying column reinforcement bars

[0058] Trim the extended longitudinal reinforcement bars of the lower column, remove mortar and other stains, calculate the required number of stirrups, and then extend the column longitudinal reinforcement bars one by one after fitting the stirrups onto the column longitudinal reinforcement bars. Align the upper and lower column longitudinal reinforcement bars at the joint with the axis and screw them into the connecting sleeve, tightening with a torque wrench. Mark the stirrup spacing on the column longitudinal reinforcement bars according to the design spacing, starting with the stirrups 50mm from the edge of the component. Move the fitted stirrups upwards and tie them from top to bottom using a wrapping method. The stirrups should be perpendicular to the column longitudinal reinforcement bars, with the column longitudinal reinforcement bars tightly against the inner corners of the stirrups. Tie all the intersections, with the ties facing the center of the column. The overlapping of the stirrup hooks should be staggered along the corners of the column. The spacing of the stirrups at the top of the column should be increased according to the construction specifications. If the design requires the installation of tie bars, the tie bars should hook onto both the column longitudinal reinforcement bars and the stirrups. After the stirrups are tied, install protective layer spacers, staggered at 600mm intervals, to ensure the accurate thickness of the protective layer for the column longitudinal reinforcement bars.

[0059] S5: Formwork support

[0060] After the column reinforcement is tied and the water and electricity pipelines and embedded parts are installed, the irregular column formwork 11 is erected. For columns of the same type with a continuous axis, the edge column formwork at both ends of the floor slab is installed first. After correction and fixing, the middle columns are corrected by pulling a straight line.

[0061] According to the column edge line position, weld Φ16 transverse support bars to the Φ20 short steel bars pre-embedded in the floor slab within the column, supporting the irregular column formwork 11 from the bottom perimeter to prevent displacement. The irregular column formwork 11 is installed in sections according to different locations. At external corners, the irregular column formwork 11 is installed as a single piece on one side; at internal corners, adjacent sides are pre-assembled into one piece. Adjust the base position of the irregular column formwork 11 according to the formwork control line for accurate positioning. Seal the formwork joints tightly with sponge tape to prevent grout leakage. Temporarily tie and fix each piece of irregular column formwork 11 to the longitudinal column reinforcement with tie wire, and continue to support the remaining irregular column formwork 11 pieces. Simultaneously install the internal support for the column formwork reinforcement. Set several steel bars of the same length as the column thickness inside the column to support the irregular column formwork 11 on both sides of the column to control the column cross-sectional thickness. Secure the outer corners of the irregular column formwork 11 with nails to close the irregular column formwork 11 together.

[0062] S6: Install universal column clamps

[0063] Install the column hoops vertically from bottom to top according to the general spacing of the formwork drawing. First, adjust the secondary keel 12 at the inside corner of the irregular column formwork 11 between the horizontal channel steel 1 and the vertical channel steel 2, and temporarily fix them to the secondary keel 12 with lead wire. Then install the rectangular frame, and use double steel pipe keels 5 to pass through the tie rods 6 around the four sides of the column formwork. Place the M12 tie rods 6 between the double steel pipes and pass them through the 14*30mm waist-shaped holes 4 reserved in the horizontal channel steel 1 or the vertical channel steel 2. Fit the mountain-shaped buckles 7 and fastening nuts 8 respectively, and temporarily lock the tie rods. Rod 6 and double steel pipe keel 5 form a rectangular frame to initially reinforce the column formwork; insert M16 long screw rod 9 into the position of M16 long nut 3 welded on the transverse channel steel 1 or longitudinal channel steel 2 between the double steel pipe keels 5, and tighten it after passing through the long nut 3. Use heavy-duty thickened mountain-shaped clamp 10 and double nuts to clamp and lock the double steel pipe keel 5 on the outside of the M16 long screw rod 9; then insert the M12 tie rod 6 into the fastening nut at the transverse channel steel 1 or longitudinal channel steel 2 and lock it. At the same time, adjust the internal support of the formwork and tighten all bolts to reinforce the column side formwork in place. The channel steel column hoop simultaneously locks the transverse channel steel 1 and longitudinal channel steel 2 at the internal corner, and reinforces the side formwork of the longitudinal and transverse limbs of the irregular column by pushing from the inside and pulling from the outside, forming a cross-interlocking structure between the channel steel column hoop, the double steel pipe keel 5 and the column side formwork. The reinforcement system of the irregular column formwork 11 is decomposed into two systems: a rectangular frame and an internal corner support. The rectangular frame consists of four-sided double steel pipe keels 5 and tie rods 6, which bear the lateral pressure of the entire irregular column formwork 11. The internal corner support consists of channel steel column hoop, opposite-sided double steel pipe keels 5 and M16 long tie rods 9, which bear the lateral pressure of the irregular column formwork 11 at the internal corner. This solves the problem that column hoops cannot be set at the internal corner of the irregular column, and distributes the lateral pressure of concrete pouring on the irregular column formwork 11 to the column hoop system, firmly positioning the formwork of all parts of the irregular column, ensuring the accuracy of the cross-sectional dimensions of the irregular column and the vertical and square corners.

[0064] S7: Install tie rods or diagonal braces

[0065] Use turnbuckles or adjustable screws as tie rods or diagonal braces for the irregular column formwork 11, and fix them to the column stirrups and the short steel bars embedded in the floor slab respectively, at a 45° angle to the ground, so as to adjust the verticality of the irregular column formwork 11.

[0066] S8: Calibration and Acceptance

[0067] After the irregular column formwork 11 is installed, it is essential to ensure that the shape, size, and relative positions of the irregular column are accurate, and that it can reliably withstand the lateral pressure of the cast-in-place concrete and the construction load, possessing sufficient strength, rigidity, and stability. Seal the gaps at the bottom of the irregular column formwork 11 to prevent grout leakage at the base. Check the formwork position against the formwork control lines on the base layer to ensure it is correct. Use a straightedge to check the verticality of the formwork; any deviations should be adjusted promptly. The verticality of the formwork is adjusted using turnbuckles or adjustable screws.

[0068] S9: Pouring concrete

[0069] After the irregular column formwork 11, its support and reinforcement, and the installation of reinforcing bars were inspected and accepted, concrete was poured. Ready-mixed concrete was pumped into the formwork. Before pouring, a 50mm thick layer of reduced-aggregate concrete with the same mix proportion as the column concrete was evenly laid at the bottom. The concrete was poured in layers, and the pouring speed was strictly controlled. The thickness of each layer was controlled to not exceed 1.25 times the effective length of the vibrator, i.e., not exceeding 45cm.

[0070] During concrete vibration, the vibrator should be moved up and down slightly to ensure even vibration. Avoid collisions with reinforcing bars, formwork, embedded parts, and electrical junction boxes. When vibrating a layer of concrete, insert the vibrator 5cm into the layer below. The vibration time at each point should be 20-30 seconds. The vibration should continue until the concrete surface no longer sinks significantly, no more air bubbles appear, and mortar appears on the surface. Do not over-vibrate.

[0071] S10: Remove column clamps and clean up spare parts.

[0072] The side formwork can only be removed after the concrete strength of the irregularly shaped column reaches 1.2 MPa, ensuring that its surface and edges are not damaged during formwork removal. First, remove the tie rods or diagonal braces, then sequentially remove the tie rods 6, double steel pipe joists 5, and horizontal and longitudinal channel steels. Next, remove the side formwork piece by piece. During formwork removal, avoid applying impact loads to the floor. If concrete adheres to or sticks to the formwork in a localized area, gently pry it apart at the bottom joint with a pry bar to separate the formwork from the concrete. After formwork removal, clean the surface promptly, apply a release agent to prevent mortar adhesion, and transport it to the storage location for sorting and stacking according to specifications. Collect and clean all removed column hoop components promptly, removing surface mortar for reuse.

[0073] Example 3

[0074] like Figure 1 , Figure 4 As shown, this embodiment, based on the construction method of cast-in-place irregular frame column using general column hoops in Embodiment 2, achieves reinforcement of the L-shaped frame column as a whole and the formwork at the inside corner.

[0075] Example 4

[0076] like Figure 5 As shown, this embodiment, based on the construction method of cast-in-place irregular frame column using general column hoop in Embodiment 2, achieves reinforcement of the entire T-shaped frame column and the formwork at the inside corner.

[0077] Example 5

[0078] like Figure 6 As shown, this embodiment, based on the construction method of cast-in-place irregular frame column using general column hoop in Embodiment 2, achieves reinforcement of the formwork for the entire cross-shaped frame column and the internal corners.

[0079] Example 6

[0080] like Figure 7 As shown, this embodiment, based on the construction method of cast-in-place irregular frame column using general column hoop in Embodiment 2, achieves reinforcement of the formwork for the entire Z-shaped frame column and the internal corners.

[0081] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0082] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A universal column hoop, characterized in that, include: Rectangular frame and multiple sets of internal corner supports; The internal corner support includes: a transverse channel steel (1) and a longitudinal channel steel (2). The transverse channel steel (1) is slidably disposed at the top of the longitudinal channel steel (2). One end of the transverse channel steel (1) and the longitudinal channel steel (2) are both welded with long nuts (3), and the other end is provided with a waist-shaped hole (4). The rectangular frame includes: a first parallel component and a second parallel component. The first parallel component and the second parallel component are respectively set at the same height as the transverse channel steel (1) and the longitudinal channel steel (2) and connected by fasteners. The first parallel component includes: two sets of parallel double steel pipe keels (5), and an adjustment mechanism is installed between the two sets of double steel pipe keels (5); The adjusting mechanism includes: a tie rod (6), which is inserted into the waist-shaped hole (4) of the transverse channel steel (1), and both ends of the tie rod (6) are fitted with mountain-shaped buckles (7), which are respectively fastened to the outer sides of two sets of double steel pipe keels (5); Both ends of the tie rod (6) and the waist-shaped hole (4) near the transverse channel steel (1) are threaded with fastening nuts (8); The fastener includes a long screw (9), one end of which is threaded into a long nut (3) of a transverse channel steel (1), and the other end is fitted with a heavy-duty thickened mountain-shaped clip (10) and a double nut clamping and locking double steel pipe keel (5).

2. The universal column clamp according to claim 1, characterized in that, The second parallel component has the same structure as the first parallel component, and the adjustment method of the second parallel component and the fixing method of the second parallel component and the vertical channel steel (2) are the same as those of the first parallel component.

3. A construction method for cast-in-place irregular-shaped frame columns using the universal column hoop as described in any one of claims 1-2, characterized in that, Includes the following steps: S1: Template Configuration Based on the engineering structure and on-site construction conditions, design and determine the assembly scheme of the irregular column formwork (11), clarify the specifications and quantity of general column hoops and secondary keels (12), the spacing and arrangement of general column hoops, verify the strength, rigidity and stability of the formwork and support, and draw a complete set of formwork assembly diagrams; S2: Measuring the chalk line On the base layer, measure and mark the column edge lines and formwork control lines according to the design positions, use a chalk line to pop out the ink lines, and mark them with red paint; S3: Base treatment Remove the weak layer at the joint of the base layer and wash it clean. Use cement mortar to strictly level the base of the irregular column formwork (11) within a 100mm width to prevent concrete leakage at the bottom of the irregular column formwork (11) from forming rotten roots. S4: Tying column reinforcement bars Calculate the required number of stirrups, insert the stirrups into the column longitudinal bars, and then extend the column longitudinal bars one by one. Align the upper and lower column longitudinal bars at the joint with the axis and screw them into the connecting sleeve. Tighten with a torque wrench. S5: Formwork support According to the column edge line position, weld the horizontal support bar on the short steel bar pre-embedded in the floor slab inside the column, and support the irregular column formwork (11) from the bottom perimeter to prevent displacement. The irregular column formwork (11) is installed in different sections according to different parts. The irregular column formwork (11) at the external corner is installed as a single piece on one side, and the irregular column formwork (11) at the internal corner is installed by pre-assembling two adjacent sides into one piece. S6: Install universal column clamps First, adjust the secondary keel (12) at the inside corner of the irregular column template (11) with the horizontal channel steel (1) and the vertical channel steel (2), and temporarily fix them to the secondary keel (12) with lead wire. Then, install the first parallel component and the second parallel component around the four sides of the irregular column template (11) with the distance adjustment mechanism corresponding to the positions of the horizontal channel steel (1) and the vertical channel steel (2) to form a rectangular frame to initially reinforce the irregular column template (11). Fix the positions of the horizontal channel steel (1) and the first parallel component, and the vertical channel steel (2) and the second parallel component with the fasteners, and then adjust them synchronously with the distance adjustment mechanism to form a cross-interlocking structure between the inside corner support, the rectangular frame and the irregular column template (11). S7: Install tie rods or diagonal braces Use turnbuckles or adjustable screws as tie rods or diagonal braces for the irregular column formwork (11), and fix them to the column stirrups and the short steel bars embedded in the floor slab respectively, at a 45° angle to the ground, so as to adjust the verticality of the irregular column formwork (11); S8: Calibration and Acceptance After the irregular column formwork (11) is installed, it must be ensured that the shape, size and relative position of the irregular column are accurate, and that it can reliably withstand the lateral pressure of the cast-in-place concrete and the construction load, and has sufficient strength, rigidity and stability. S9: Pouring concrete; S10: Remove the column clamps and clean up for future use.

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